Coupling of ferroelasticity and ferromagnetism in La_<1-x>Sr_xCoO_3 twin crystals
Coupling of ferroelasticity and ferromagnetism in La_<1-x>Sr_xCoO_3 twin crystals
复制标题
La_<1-x>Sr_xCoO_3孪晶中铁弹性和铁磁性的耦合
DOI：
10.1103/physrevb.82.064402
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发表时间：
2010
期刊：
影响因子：
--
通讯作者：
and Masahisa Ito
中科院分区：
文献类型：
--
作者：
Toru Kyomen;Akito Sano;Yohei Murachi;Minoru Hanaya;Kosuke Suzuki;and Masahisa Ito
本文采用劳厄法对具有三角形结构的孪晶进行了磁场下的x射线衍射实验，并对其磁化强度进行了测量。在外加磁场的作用下，晶体铁磁相中的晶体畴（变异体）被重新排列，即使外加磁场变为零，重新排列的结构仍然存在，表明了铁弹性和铁磁性的耦合。单轴磁晶各向异性大，易于磁化的平面平行于三角形结构的六边形平面，这与目前的结果一致。讨论了Co离子自旋态与大磁晶各向异性的关系。
In the present study, x-ray diffraction experiments under magnetic fields were carried out fortwin crystals with a trigonal structure by Laue method in addition to magnetization measurements. Crystallographic domains (variants) in a ferromagnetic phase of the crystals were rearranged by applying magnetic fields and the rearranged structure remained even after the applied magnetic fields were changed to zero, indicating a coupling of ferroelasticity and ferromagnetism. The present results were consistently understood by the large uniaxial magnetocrystalline anisotropy with an easy plane of magnetization parallel to the hexagonalplane of the trigonal structure. The origin of the large magnetocrystalline anisotropy was discussed in relation to the spin states of Co ions.